They usually become more active during their normal times (usually at night) and begin wandering around their tanks looking for anything to eat. My snake sometimes will roam around the feeding end of his tank hoping I notice so I can feed him. Most people will just feed their snake on a regular schedule. Depending on the snake's size, it can be as often as every 4 days to every 7-10 days. Since yours is a baby, I recommend feeding it more often.